When comparing LastPass vs Tasker, the Slant community recommends LastPass for most people. In the question“What are the most useful Android phone apps?”LastPass is ranked 5th while Tasker is ranked 12th. The most important reason people chose LastPass is:

LastPass keeps an encrypted copy of all passwords locally as well as an encrypted copy on their servers. That way, passwords can be accessed locally while offline, or through their server while online from any machine.

Pros

Pro

Automatic cloud backup and cross-device sync

LastPass keeps an encrypted copy of all passwords locally as well as an encrypted copy on their servers. That way, passwords can be accessed locally while offline, or through their server while online from any machine.

Pro

All encryption and decryption is done locally

All the encryption and decryption is done by the client (JS/App) so even LastPass doesn't have access to passwords.

Pro

Seamless autofill and password generator via plugins for all popular browsers

All common browsers, including Opera, have plugins that allow automatically filling in forms and generating passwords. All form fill information syncs across all platforms, devices and browsers. Password generator can be adjusted to use or exclude certain characters and patterns.

Pro

Yubikey Support

Pro

Password One-Click Change

LastPass is able to change your password automagically.

Pro

Offers multiple export options

LastPass can dump the whole database as a .csv file or an encrypted file that can then be decrypted using LastPass Pocket as well as separately export Wi-Fi passwords and autofill information. Additional export options are available on a per-browser basis.

Pro

Can create one-time passwords for accessing the Vault

LastPass allows creating passwords for accessing the LastPass Vault that can only be used once. Great for accessing the Vault in public or untrusted places.

Pro

Vetted by Steve Gibson

Steve Gibson is a well established security researcher best know for his work with Apple and Atari systems as well as founding Gibson Research Corporation. He was given access to LastPass' source code and confirmed that it's safe to trust its security.

Pro

Allows downloading an encrypted database backup that can only be decrypted with LastPass Pocket

LastPass Pocket is a standalone personal database decrypter. It's a portable executable, meaning it does not need to be installed, that is used to decrypt a local encrypted copy of the password database.

Pro

Military grade encryption

Pro

Works even with browsers that don't support plugins

Via a clever use of bookmarklets, LastPass works on browsers that don't inherently support bookmarklets, like Opera or Safari on iOS.

Pro

Credit monitoring in US

LastPass can be set to notify if a user's credit report suddenly changes.

Pro

Works with Windows applications with native app

Can record the steps and use it to login to native Windows apps.

Pro

Integrates well with XMarks

XMarks and LastPass are developed by a developer who offers discounts on annual subs for both apps.

Pro

Infinitely tweakable

Tasker has an impressive amount of triggers, actions, and parameters that can be used together in an incredible variety of ways. It can even accept scripts to follow instructions.

Pro

Create powerful custom applications

Tasker has the ability to create custom applications, effectively replacing multiple installed apps in your phone with tasks that are triggered automatically. What's even better is that they will be custom tailored to fit your specific needs.

Pro

Can adjust system software

With Root access it can also dabble with system software which other apps are not likely to achieve at the moment.

Pro

Export tasks as standalone apps

Tasker allows exporting workflows you've created as standalone applications that can then be shared or even put on the Google Play store.

Pro

Awesome plugin support

Tasker has awesome plugin support to connect with hardware that usually requires installing specific apps. For example, it has a plugin for Pebble smartwatch so that you can automate tasks that require using Pebble.

Cons

Con

Not free/libre

This application is proprietary, and thus cannot be modified, freely distributed, or trusted to be secure.

Con

Forced cloud backup

The is no way to opt-out of saving all of passwords on LastPass servers.

Con

When generating passwords, LastPass tends to put the wrong info in forms

For forms with both an email address and username, LastPass tends to mix up and overwrite information.

Con

Forgets to ask "add new site?" on some websites

So you are forced to add a new site manually, which takes too long (relatively speaking).

Con

Somewhat poor customer service

LastPass maintains a support forum which they mostly ignore, labeling it "mostly peer-to-peer support" leaving only their e-mail ticket system to turn to.

Con

History of bad support for the company behind LastPass

You never know how much you will pay for it because LogMeIn did the same with Hamachi product. Support will be bad.

Con

Has been hacked before

And becomes extra bad as you are forced to have everything at one central cloud place.

Con

Doesn't always log out when idle

This issue is especially common with the mobile app.

Con

Recently doubled annual subscription rates

This applies even if you're a re-subscribing customer.

Con

Mobile apps are not intuitive

Con

Steep learning curve

Tasker lacks good documentation or tutorials, which is important as the learning curve is very high if you want to use its advance features where this app actually shines.

Con

Awful user interface

While it's incredibly powerful, Tasker's user interface is counter-intuitive, confusing, and just plain clunky at every turn.